What is OpenWhisk and how to setup a cluster using this technology?

Question

On IBM bluemix platform it is possible to write cloud functions using OpenWhisk, but what is OpenWhisk and how to setup a cluster using this technology?

Answer 1

According to this GitHub readme

OpenWhisk is a serverless event-based programming service.

In order to get an idea how to setup this tool on a cluster one could run the following code that is defined in the readme:

# Clone openwhisk
git clone --depth=1 https://github.com/apache/incubator-openwhisk.git openwhisk

# Change directory to tools/vagrant
cd openwhisk/tools/vagrant

# Run script to create vm and run hello action
./hello